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1.1 root 1: /* Compilation switch flag definitions for GNU CC.
2: Copyright (C) 1987, 1988 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
6: GNU CC is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 2, or (at your option)
9: any later version.
10:
11: GNU CC is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU CC; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: /* Name of the input .c file being compiled. */
21: extern char *main_input_filename;
22:
23: enum debug_info_type
24: {
25: NO_DEBUG, /* Write no debug info. */
26: DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
27: SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
28: DWARF_DEBUG /* Write Dwarf debug info (using dwarfout.c). */
29: };
30:
31: /* Specify which kind of debugging info to generate. */
32: extern enum debug_info_type write_symbols;
33:
34: enum debug_info_level
35: {
36: DINFO_LEVEL_NONE, /* Write no debugging info. */
37: DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
38: DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
39: DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
40: };
41:
42: /* Specify how much debugging info to generate. */
43: extern enum debug_info_level debug_info_level;
44:
45: #ifdef DBX_DEBUGGING_INFO
46: /* Nonzero means use GDB-only extensions of DBX format. */
47: extern int use_gdb_dbx_extensions;
48: #endif
49:
50: /* Nonzero means do optimizations. -opt. */
51:
52: extern int optimize;
53:
54: /* Nonzero means do stupid register allocation. -noreg.
55: Currently, this is 1 if `optimize' is 0. */
56:
57: extern int obey_regdecls;
58:
59: /* Don't print functions as they are compiled and don't print
60: times taken by the various passes. -quiet. */
61:
62: extern int quiet_flag;
63:
64: /* Don't print warning messages. -w. */
65:
66: extern int inhibit_warnings;
67:
68: /* Do print extra warnings (such as for uninitialized variables). -W. */
69:
70: extern int extra_warnings;
71:
72: /* Nonzero to warn about unused local variables. */
73:
74: extern int warn_unused;
75:
76: /* Nonzero to warn about variables used before they are initialized. */
77:
78: extern int warn_uninitialized;
79:
80: /* Nonzero means warn about all declarations which shadow others. */
81:
82: extern int warn_shadow;
83:
84: /* Warn if a switch on an enum fails to have a case for every enum value. */
85:
86: extern int warn_switch;
87:
88: /* Nonzero means warn about function definitions that default the return type
89: or that use a null return and have a return-type other than void. */
90:
91: extern int warn_return_type;
92:
93: /* Nonzero means warn about pointer casts that increase the required
94: alignment of the target type (and might therefore lead to a crash
95: due to a misaligned access). */
96:
97: extern int warn_cast_align;
98:
99: /* Nonzero means warn about any identifiers that match in the first N
100: characters. The value N is in `id_clash_len'. */
101:
102: extern int warn_id_clash;
103: extern int id_clash_len;
104:
105: /* Warn if a function returns an aggregate,
106: since there are often incompatible calling conventions for doing this. */
107:
108: extern int warn_aggregate_return;
109:
110: /* Nonzero if generating code to do profiling. */
111:
112: extern int profile_flag;
113:
114: /* Nonzero if generating code to do profiling on the basis of basic blocks. */
115:
116: extern int profile_block_flag;
117:
118: /* Nonzero for -pedantic switch: warn about anything
119: that standard C forbids. */
120:
121: extern int pedantic;
122:
123: /* Temporarily suppress certain warnings.
124: This is set while reading code from a system header file. */
125:
126: extern int in_system_header;
127:
128: /* Nonzero for -dp: annotate the assembly with a comment describing the
129: pattern and alternative used. */
130:
131: extern int flag_print_asm_name;
132:
133: /* Now the symbols that are set with `-f' switches. */
134:
135: /* Nonzero means `char' should be signed. */
136:
137: extern int flag_signed_char;
138:
139: /* Nonzero means give an enum type only as many bytes as it needs. */
140:
141: extern int flag_short_enums;
142:
143: /* Nonzero for -fcaller-saves: allocate values in regs that need to
144: be saved across function calls, if that produces overall better code.
145: Optional now, so people can test it. */
146:
147: extern int flag_caller_saves;
148:
149: /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
150:
151: extern int flag_pcc_struct_return;
152:
153: /* Nonzero for -fforce-mem: load memory value into a register
154: before arithmetic on it. This makes better cse but slower compilation. */
155:
156: extern int flag_force_mem;
157:
158: /* Nonzero for -fforce-addr: load memory address into a register before
159: reference to memory. This makes better cse but slower compilation. */
160:
161: extern int flag_force_addr;
162:
163: /* Nonzero for -fdefer-pop: don't pop args after each function call;
164: instead save them up to pop many calls' args with one insns. */
165:
166: extern int flag_defer_pop;
167:
168: /* Nonzero for -ffloat-store: don't allocate floats and doubles
169: in extended-precision registers. */
170:
171: extern int flag_float_store;
172:
173: /* Nonzero enables strength-reduction in loop.c. */
174:
175: extern int flag_strength_reduce;
176:
177: /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
178: number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
179: UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
180: unrolled. */
181:
182: extern int flag_unroll_loops;
183:
184: /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
185: This is generally not a win. */
186:
187: extern int flag_unroll_all_loops;
188:
189: /* Nonzero for -fcse-follow-jumps:
190: have cse follow jumps to do a more extensive job. */
191:
192: extern int flag_cse_follow_jumps;
193:
194: /* Nonzero for -fexpensive-optimizations:
195: perform miscellaneous relatively-expensive optimizations. */
196: extern int flag_expensive_optimizations;
197:
198: /* Nonzero for -fwritable-strings:
199: store string constants in data segment and don't uniquize them. */
200:
201: extern int flag_writable_strings;
202:
203: /* Nonzero means don't put addresses of constant functions in registers.
204: Used for compiling the Unix kernel, where strange substitutions are
205: done on the assembly output. */
206:
207: extern int flag_no_function_cse;
208:
209: /* Nonzero for -fomit-frame-pointer:
210: don't make a frame pointer in simple functions that don't require one. */
211:
212: extern int flag_omit_frame_pointer;
213:
214: /* Nonzero to inhibit use of define_optimization peephole opts. */
215:
216: extern int flag_no_peephole;
217:
218: /* Nonzero means all references through pointers are volatile. */
219:
220: extern int flag_volatile;
221:
222: /* Nonzero means make functions that look like good inline candidates
223: go inline. */
224:
225: extern int flag_inline_functions;
226:
227: /* Nonzero for -fkeep-inline-functions: even if we make a function
228: go inline everywhere, keep its defintion around for debugging
229: purposes. */
230:
231: extern int flag_keep_inline_functions;
232:
233: /* Nonzero means that functions declared `inline' will be treated
234: as `static'. Prevents generation of zillions of copies of unused
235: static inline functions; instead, `inlines' are written out
236: only when actually used. Used in conjunction with -g. Also
237: does the right thing with #pragma interface. */
238:
239: extern int flag_no_inline;
240:
241: /* Nonzero if we are only using compiler to check syntax errors. */
242:
243: extern int flag_syntax_only;
244:
245: /* Nonzero means we should save auxilliary info into a .X file. */
246:
247: extern int flag_gen_aux_info;
248:
249: /* Nonzero means make the text shared if supported. */
250:
251: extern int flag_shared_data;
252:
253: /* flag_schedule_insns means schedule insns within basic blocks (before
254: local_alloc).
255: flag_schedule_insns_after_reload means schedule insns after
256: global_alloc. */
257:
258: extern int flag_schedule_insns;
259: extern int flag_schedule_insns_after_reload;
260:
261: /* Nonzero means put things in delayed-branch slots if supported. */
262:
263: extern int flag_delayed_branch;
264:
265: /* Nonzero means pretend it is OK to examine bits of target floats,
266: even if that isn't true. The resulting code will have incorrect constants,
267: but the same series of instructions that the native compiler would make. */
268:
269: extern int flag_pretend_float;
270:
271: /* Nonzero means change certain warnings into errors.
272: Usually these are warnings about failure to conform to some standard. */
273:
274: extern int flag_pedantic_errors;
275:
276: /* Nonzero means generate position-independent code.
277: This is not fully implemented yet. */
278:
279: extern int flag_pic;
280:
281: /* Nonzero means place uninitialized global data in the bss section. */
282:
283: extern int flag_no_common;
284:
285: /* -finhibit-size-directive inhibits output of .size for ELF.
286: This is used only for compiling crtstuff.c,
287: and it may be extended to other effects
288: needed for crtstuff.c on other systems. */
289: extern int flag_inhibit_size_directive;
290:
291: /* -fgnu-linker specifies use of the GNU linker for initializations.
292: -fno-gnu-linker says that collect will be used. */
293: extern int flag_gnu_linker;
294:
295: /* Other basic status info about current function. */
296:
297: /* Nonzero means current function must be given a frame pointer.
298: Set in stmt.c if anything is allocated on the stack there.
299: Set in reload1.c if anything is allocated on the stack there. */
300:
301: extern int frame_pointer_needed;
302:
303: /* Set nonzero if jump_optimize finds that control falls through
304: at the end of the function. */
305:
306: extern int can_reach_end;
307:
308: /* Nonzero if function being compiled receives nonlocal gotos
309: from nested functions. */
310:
311: extern int current_function_has_nonlocal_label;
312:
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